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[TowerTalk] Effect of feedline on apparent resonance

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Subject: [TowerTalk] Effect of feedline on apparent resonance
From: (Pete Smith)
Date: Mon Mar 10 08:45:53 2003
At 06:24 AM 3/10/03 -0600, w5ah wrote:
>from your comment below, I presume you mean the frequency with the
>best SWR went
>up.   SWR has nothing to do with antenna resonance.

Yes, that's exactly why I said "apparent resonance."

I have an MFJ259B, and have used it to check the VF.  It comes in right at 
.72.  The cable is made for the Wireman, and their other specs appear to be 
very close to standard RG-8X, except that they use a polyethylene 
dielectric and a tougher jacket.

I've pretty well satisfied myself, though fiddling with TLW, that what I 
need to do is trim the cable enough so that its reactance as an open stub 
is the same as that of the original Belden.  At that point its resistance 
will also be very close, so within the limits of my ability to measure 
things I should be back where I was.

Thanks to everyone who replied.

73, Pete N4ZR
The World HF Contest Station Database was updated 23 Feb 03.
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